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|
# Locate SDL library
# This module defines
# SDL_LIBRARY, the name of the library to link against
# SDL_FOUND, if false, do not try to link to SDL
# SDL_INCLUDE_DIR, where to find SDL.h
#
# This module responds to the the flag:
# SDL_BUILDING_LIBRARY
# If this is defined, then no SDL_main will be linked in because
# only applications need main().
# Otherwise, it is assumed you are building an application and this
# module will attempt to locate and set the the proper link flags
# as part of the returned SDL_LIBRARY variable.
#
# Don't forget to include SDLmain.h and SDLmain.m your project for the
# OS X framework based version. (Other versions link to -lSDLmain which
# this module will try to find on your behalf.) Also for OS X, this
# module will automatically add the -framework Cocoa on your behalf.
#
#
# Additional Note: If you see an empty SDL_LIBRARY_TEMP in your configuration
# and no SDL_LIBRARY, it means CMake did not find your SDL library
# (SDL.dll, libsdl.so, SDL.framework, etc).
# Set SDL_LIBRARY_TEMP to point to your SDL library, and configure again.
# Similarly, if you see an empty SDLMAIN_LIBRARY, you should set this value
# as appropriate. These values are used to generate the final SDL_LIBRARY
# variable, but when these values are unset, SDL_LIBRARY does not get created.
#
#
# $SDLDIR is an environment variable that would
# correspond to the ./configure --prefix=$SDLDIR
# used in building SDL.
# l.e.galup 9-20-02
#
# Modified by Eric Wing.
# Added code to assist with automated building by using environmental variables
# and providing a more controlled/consistent search behavior.
# Added new modifications to recognize OS X frameworks and
# additional Unix paths (FreeBSD, etc).
# Also corrected the header search path to follow "proper" SDL guidelines.
# Added a search for SDLmain which is needed by some platforms.
# Added a search for threads which is needed by some platforms.
# Added needed compile switches for MinGW.
#
# On OSX, this will prefer the Framework version (if found) over others.
# People will have to manually change the cache values of
# SDL_LIBRARY to override this selection or set the CMake environment
# CMAKE_INCLUDE_PATH to modify the search paths.
#
# Note that the header path has changed from SDL/SDL.h to just SDL.h
# This needed to change because "proper" SDL convention
# is #include "SDL.h", not <SDL/SDL.h>. This is done for portability
# reasons because not all systems place things in SDL/ (see FreeBSD).
FIND_PATH(SDL_INCLUDE_DIR SDL.h
PATHS
$ENV{SDLDIR}
NO_DEFAULT_PATH
PATH_SUFFIXES include
)
FIND_PATH(SDL_INCLUDE_DIR SDL.h
PATHS ${CMAKE_PREFIX_PATH} # Unofficial: We are proposing this.
NO_DEFAULT_PATH
PATH_SUFFIXES include
)
FIND_PATH(SDL_INCLUDE_DIR SDL.h
PATHS
~/Library/Frameworks
/Library/Frameworks
/usr/local/include/SDL
/usr/include/SDL
/usr/local/include/SDL12
/usr/local/include/SDL11 # FreeBSD ports
/usr/include/SDL12
/usr/include/SDL11
/usr/local/include
/usr/include
/sw/include/SDL # Fink
/sw/include
/opt/local/include/SDL # DarwinPorts
/opt/local/include
/opt/csw/include/SDL # Blastwave
/opt/csw/include
/opt/include/SDL
/opt/include
)
#MESSAGE("SDL_INCLUDE_DIR is ${SDL_INCLUDE_DIR}")
# SDL-1.1 is the name used by FreeBSD ports...
# don't confuse it for the version number.
FIND_LIBRARY(SDL_LIBRARY_TEMP
NAMES SDL SDL-1.1
PATHS
$ENV{SDLDIR}
NO_DEFAULT_PATH
PATH_SUFFIXES lib64 lib
)
FIND_LIBRARY(SDL_LIBRARY_TEMP
NAMES SDL SDL-1.1
PATHS ${CMAKE_PREFIX_PATH} # Unofficial: We are proposing this.
NO_DEFAULT_PATH
PATH_SUFFIXES lib64 lib
)
FIND_LIBRARY(SDL_LIBRARY_TEMP
NAMES SDL SDL-1.1
PATHS
/usr/local
/usr
/sw
/opt/local
/opt/csw
/opt
PATH_SUFFIXES lib64 lib
)
#MESSAGE("SDL_LIBRARY_TEMP is ${SDL_LIBRARY_TEMP}")
IF(NOT SDL_BUILDING_LIBRARY)
IF(NOT ${SDL_INCLUDE_DIR} MATCHES ".framework")
# Non-OS X framework versions expect you to also dynamically link to
# SDLmain. This is mainly for Windows and OS X. Other (Unix) platforms
# seem to provide SDLmain for compatibility even though they don't
# necessarily need it.
FIND_LIBRARY(SDLMAIN_LIBRARY
NAMES SDLmain SDLmain-1.1
PATHS
$ENV{SDLDIR}
NO_DEFAULT_PATH
PATH_SUFFIXES lib64 lib
)
FIND_LIBRARY(SDLMAIN_LIBRARY
NAMES SDLmain SDLmain-1.1
PATHS ${CMAKE_PREFIX_PATH} # Unofficial: We are proposing this.
NO_DEFAULT_PATH
PATH_SUFFIXES lib64 lib
)
FIND_LIBRARY(SDLMAIN_LIBRARY
NAMES SDLmain SDLmain-1.1
PATHS
/usr/local
/usr
/sw
/opt/local
/opt/csw
/opt
PATH_SUFFIXES lib64 lib
)
ENDIF(NOT ${SDL_INCLUDE_DIR} MATCHES ".framework")
ENDIF(NOT SDL_BUILDING_LIBRARY)
# SDL may require threads on your system.
# The Apple build may not need an explicit flag because one of the
# frameworks may already provide it.
# But for non-OSX systems, I will use the CMake Threads package.
IF(NOT APPLE)
FIND_PACKAGE(Threads)
ENDIF(NOT APPLE)
# MinGW needs an additional library, mwindows
# It's total link flags should look like -lmingw32 -lSDLmain -lSDL -lmwindows
# (Actually on second look, I think it only needs one of the m* libraries.)
IF(MINGW)
SET(MINGW32_LIBRARY mingw32 CACHE STRING "mwindows for MinGW")
ENDIF(MINGW)
SET(SDL_FOUND "NO")
IF(SDL_LIBRARY_TEMP)
# For SDLmain
IF(NOT SDL_BUILDING_LIBRARY)
IF(SDLMAIN_LIBRARY)
SET(SDL_LIBRARY_TEMP ${SDLMAIN_LIBRARY} ${SDL_LIBRARY_TEMP})
ENDIF(SDLMAIN_LIBRARY)
ENDIF(NOT SDL_BUILDING_LIBRARY)
# For OS X, SDL uses Cocoa as a backend so it must link to Cocoa.
# CMake doesn't display the -framework Cocoa string in the UI even
# though it actually is there if I modify a pre-used variable.
# I think it has something to do with the CACHE STRING.
# So I use a temporary variable until the end so I can set the
# "real" variable in one-shot.
IF(APPLE)
SET(SDL_LIBRARY_TEMP ${SDL_LIBRARY_TEMP} "-framework Cocoa")
ENDIF(APPLE)
# For threads, as mentioned Apple doesn't need this.
# In fact, there seems to be a problem if I used the Threads package
# and try using this line, so I'm just skipping it entirely for OS X.
IF(NOT APPLE)
SET(SDL_LIBRARY_TEMP ${SDL_LIBRARY_TEMP} ${CMAKE_THREAD_LIBS_INIT})
ENDIF(NOT APPLE)
# For MinGW library
IF(MINGW)
SET(SDL_LIBRARY_TEMP ${MINGW32_LIBRARY} ${SDL_LIBRARY_TEMP})
ENDIF(MINGW)
# Set the final string here so the GUI reflects the final state.
SET(SDL_LIBRARY ${SDL_LIBRARY_TEMP} CACHE STRING "Where the SDL Library can be found")
# Set the temp variable to INTERNAL so it is not seen in the CMake GUI
SET(SDL_LIBRARY_TEMP "" CACHE INTERNAL "")
SET(SDL_FOUND "YES")
ENDIF(SDL_LIBRARY_TEMP)
#MESSAGE("SDL_LIBRARY is ${SDL_LIBRARY}")
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